MediumPublic exploit

Buffer Overflow in WS_FTP Server 5.03 FTP Commands

IdentifiersCVE-2004-1135CWE-120

CVE-2004-1135 describes multiple buffer overflow vulnerabilities in WS_FTP Server version 5.03 (build 2004.10.14). The vulnerabilities are triggered when the server processes excessively long arguments to the SITE, XMKD, MKD, and RNFR FTP commands, leading to buffer overflows. These flaws are due to insufficient bounds checking when handling user-supplied input for these commands.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

A remote attacker can exploit these buffer overflows to crash the WS_FTP Server process, resulting in a denial of service. Depending on the specifics of the overflow and the underlying system, there may also be a risk of remote code execution, although the description only confirms denial of service.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, restrict access to the WS_FTP Server to trusted hosts only, and monitor for abnormal or unexpected FTP command usage. Consider using network-level controls to limit exposure until the server can be patched.

Remediation

Patch, then assume compromise.

Upgrade to a version of WS_FTP Server in which these buffer overflow vulnerabilities have been patched. Consult the vendor's security advisories for the appropriate fixed version.

PUBLIC EXPLOITS

Exploits

1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).

VALID 1 / 2 TOTALView more in app

wsftp_server_503_mkd.rbMaturityWeaponizedFrameworkmetasploitVerified exploit

This repository contains a single Metasploit module targeting a buffer overflow vulnerability in the MKD command of IPSWITCH WS_FTP Server version 5.03 (CVE-2004-1135). The exploit is implemented in Ruby and leverages the Metasploit framework's FTP support. The module connects to the target FTP server, logs in, and sends a specially crafted MKD command containing a large buffer that overflows the server's memory, overwriting return addresses and injecting a user-supplied payload. The payload can be any Metasploit-compatible shellcode up to 480 bytes, with certain bad characters avoided. The exploit requires network access to the FTP service and valid credentials. If successful, it provides arbitrary code execution on the target Windows system. The repository is structured as a typical Metasploit exploit module, with all logic contained in a single Ruby file.

Disclosed Nov 29, 2004rubynetwork

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

IpswitchWs Ftp Serverapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

No public activity tracked yet. Mallory keeps watching.

0 SOURCESView more in app

No public activity observed for this vulnerability.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity